Implement final(?) campaign designs, get modal working over map

[floatplane]

This should be basically ready to go now, I think. Feature flag is still off so merging it should be safe.

• map modal displays at most every 8 hours (this can be tuned in campaigns.ts)
• campaign banner in obs list is smaller, can be scrolled away
• useCampaign hook returns a stable value as long as the active screen remains focused, so you can render with it

All the buttons and whatnot are wired up and sending events.

map	list

[stevekuznetsov]

@floatplane in a conversation with Charlotte last week she had mentioned only showing the map modal once per user - so dismissing it would be final for the campaign. Did we change that to once every eight hours? I think in practice that would mean almost every time someone opens the app

[floatplane]

@floatplane in a conversation with Charlotte last week she had mentioned only showing the map modal once per user - so dismissing it would be final for the campaign. Did we change that to once every eight hours? I think in practice that would mean almost every time someone opens the app

I had a conversation with here where she said once per day. I'm assuming this isn't finalized yet!

tl;dr we can support whatever. for showing once, we just increase the frequency so high that it can't be shown more than once before the end of the campaign cycle.

[stevekuznetsov]

Sounds good! Do you want to wait on anything else with this PR? The code looks good, we can merge it as it is I think

[floatplane]

thanks for taking a look! merging now